CN110325431A

CN110325431A - Structure of front auxiliary frame

Info

Publication number: CN110325431A
Application number: CN201780069708.4A
Authority: CN
Inventors: 小宫胜行; 石川靖
Original assignee: Mazda Automobile Co
Current assignee: Mazda Automobile Co; Mazda Motor Corp
Priority date: 2016-11-17
Filing date: 2017-10-27
Publication date: 2019-10-11
Anticipated expiration: 2037-10-27
Also published as: CN110325431B; JP2018079837A; WO2018092549A1; JP6237863B1; EP3521141A4; EP3521141A1; US10889328B2; US20190300059A1

Abstract

Structure of front auxiliary frame includes subframe main body and pair of right and left longitudinal member.Subframe main body has support portion, arm Backside support portion and disengaging portion on front side of arm.Each longitudinal member the longitudinal member rear portion and relative to support portion on front side of arm and be located at vehicle width direction outside have flex portion.Lower arm has front-rear direction extended portion at the rear portion of the lower arm.Moreover, the front face of the vehicle front side in the rear face and lower arm of flex portion positioned at front-rear direction extended portion extends roughly in parallel in the vehicle width direction, reinforcement part is equipped on the face opposite with the front face of front-rear direction extended portion in the rear face of flex portion.

Description

Structure of front auxiliary frame

Technical field

The present invention relates to the structure of front auxiliary frame of vehicle.

Background technique

In the past, it is known that a kind of following structure: in front part of vehicle and in the pair of right and left front longitudinal beam extended along the longitudinal direction Lower section setting supporting suspension, steering mechanism and dynamical system etc. fore sub frame (hereinafter referred to as " subframe "), occur in vehicle When preceding collision, impact energy is absorbed by the deformation of front longitudinal beam but also impact energy is secondarily absorbed by subframe.

In addition, it is known that following structure in auxiliary frame structure: on the one hand in order to improve wheel supporting when driving Rigidity and use strong structure, indulged before on the other hand not interfered for the subframe that keeps this strong in collision before vehicle occurs The deformation of beam and make during the phase to later period in an impact the rear end of the subframe from vehicle body be detached from.

For example, Patent Document 1 discloses the following technical solutions: load when using preceding collision makes the subframe Nearby fastener (bolt) etc. is extracted to vehicle width direction bending to make subframe be detached from from vehicle body in part for rear end.

The subframe that the front-body structure of the vehicle of patent document 1 has includes: subframe main body, has left and right one To front protruding portion outstanding forwards (relative to position lower arm mounting portion (41a) in the rear part (41e) of longitudinal member (41) In the part at rear)；Pair of right and left longitudinal member (front part (41c) and bending section (41d) of the longitudinal member (41)), from institute Front protruding portion is stated (to be located at relative to the lower arm mounting portion (41a) in the rear part (41e) of longitudinal member (41) via linking part The part in front) further extend to vehicle front；Wherein, the front protruding portion in the front of subframe main body be provided with via Support portion (lower arm mounting portion on front side of arm of the bushing to support the front (front side linking part (53)) for the lower arm for constituting suspension (41a)), and in the case where the rear portion of subframe main body is provided with and supports in the same manner as front via bushing on rear side of post-brachial arm Support portion (fastening part (45)).

Moreover, the subframe of patent document 1 is in such a way in order to improve load transitivity when the preceding collision of vehicle And it is configured: when colliding before generation, so that the collision load come from longitudinal member transmitting is branched into two kinds of loads, that is, in the past Square protruding portion make around lower arm the rear end of subframe nearby part to the mode of vehicle width direction bending come the load that transmits and with Make to be compressed axially the then rear end of the longitudinal member of regression shape to abut to prop up on rear side of arm via the lower arm with lower arm The load for extracting the mode of fastener (bolt) at support part to transmit, to utilize both loads in collision before vehicle occurs Be detached from subframe effectively from vehicle body.

However, since the subframe of patent document 1 is used from bending section towards linking part and front protruding portion in the backward For Fang Eryue to inclined structure on the inside of vehicle width direction, the leading edge of lower arm is similarly formed as more past in a manner of around subframe Rear and more to shape inclined on the inside of vehicle width direction, therefore, in collision before vehicle occurs, even if the bending section retreated is under Arm abuts, and the trailing flank of bending section and the mutual face of the leading flank of lower arm are also difficult to dock well, therefore, pass through from bending section By lower arm come effectively there are also rooms for improvement for transfer charge this point.

In addition, disclosing a kind of draft hitch of following automobile in patent document 2: in the first deflection of beam of suspension beam The bending section reinforcer (stiffener) Lai Jiaqiang is set in portion.

However, due to the reinforcer not only to bending section carry out reinforce but also to from the bending section in the backward Fang Eryue to Inclined first beam is reinforced until in front of the front of the supporting support of lower arm (18) on the inside of vehicle width direction, therefore, aobvious and easy See, when collision before vehicle occurs causes bending section bending to retreat, even if the supporting support (18) of the reinforcer and lower arm Itself abuts and is also difficult to abut with the leading flank of lower arm, to be difficult to transmit collision load.That is, in the bending section of patent document 2 The purpose of upper setting reinforcer is biography of load when vehicle front collision occurring to improve toward subframe main body (the second beam) side Passing property shows no sign of the design being disclosed directly below in patent document 2: in order to improve biography of the collision load from bending section toward lower arm front It passing property and improves transitivity of the collision load from lower arm front toward arm Backside support portion and reinforcer is set on the bends.

Existing technical literature

Patent document

Patent document 1: Japanese patent gazette the 5949600th

Patent document 2: Japanese Patent Open Publication 2002-200988

Summary of the invention

The purpose of the present invention is to provide a kind of following structure of front auxiliary frame: can either be using in the shape around dynamical system The subframe of shape, and raising rigidity (improving eigentone) can be taken into account and improve preceding collision load transitivity and (reinforce folding Pars convoluta and the load for reinforcing past lower arm transmit).

Structure of front auxiliary frame involved in a technical solution of the invention includes: subframe main body, is supported in front part of vehicle Each lower section for the front longitudinal beam that pair of right and left extends along the longitudinal direction respectively is arranged in suspension, the suspension；And pair of right and left is vertical To component, respectively forwardly just extend from the subframe main body；Wherein, the subframe main body includes support and constitutes described hang Support portion and arm Backside support portion on front side of the front of the lower arm of frame and the arm at rear portion；Subframe is utilized in arm Backside support portion Retreat the disengaging portion that load or lower arm retreat load to be detached from the subframe main body from the front longitudinal beam, each longitudinal direction Component the longitudinal member rear portion and relative to support portion on front side of the arm and be located at vehicle width direction outside have flex portion, The lower arm has the front-rear direction extended portion that extends along the longitudinal direction at the rear portion of the lower arm, the rear face of the flex portion and The front face of vehicle front side in the lower arm positioned at the front-rear direction extended portion extends roughly in parallel in the vehicle width direction, It is equipped on the face opposite with the front face of the front-rear direction extended portion in the rear face of the flex portion Reinforcement part.

Detailed description of the invention

Fig. 1 is the mode top view for indicating the partial structurtes in left side of structure of front auxiliary frame involved in embodiment.

Fig. 2 is the mode side view for indicating structure of front auxiliary frame involved in embodiment.

Fig. 3 corresponds to Fig. 2, is the mode side view for indicating to eliminate the structure of front auxiliary frame in the state of lower arm.

Fig. 4 is the mode cross-sectional view for indicating the part of IV-IV line section of structure of front auxiliary frame shown in Fig. 2.

Fig. 5 is the mode top view of the opposite structure of the leading flank for the trailing flank and lower arm for indicating flex portion.

Fig. 6 is the mode cross-sectional view for indicating the part of line VI -- VI section of structure of front auxiliary frame shown in FIG. 1.

Specific embodiment

In the following, describing embodiment in detail with reference to the accompanying drawings.

Embodiment described below is one embodiment of the present invention, the present invention in addition to its essential structure it It is not also limited outside by the following embodiments and the accompanying drawings at all.

[embodiment]

Illustrate the structure of front auxiliary frame of vehicle involved in embodiment using Fig. 1 to Fig. 6.

Fig. 1 is that the mode for the partial structurtes of left part for indicating structure of front auxiliary frame involved in embodiment is overlooked Figure, Fig. 2 is the mode side view for indicating the partial structurtes in left side of structure of front auxiliary frame involved in embodiment, and Fig. 3 is table Show that the mode side view of the structure of front auxiliary frame in the state of eliminating lower arm, Fig. 4 are to indicate structure of front auxiliary frame shown in Fig. 2 IV-IV line section part mode cross-sectional view, Fig. 5 is the opposite knot of the leading flank for the trailing flank and lower arm for indicating flex portion The mode top view of structure is to eliminate the upper plate of subframe come the mode enlarged plan view illustrated, and Fig. 6 is to indicate Fig. 1 institute The mode cross-sectional view of the part of the line VI -- VI section of the structure of front auxiliary frame shown.

In figure, arrow F indicates that vehicle front, arrow R indicate vehicle right, and arrow L indicates vehicle left, and arrow U is indicated Vehicle up direction.Further, since the symmetrical shape of structure of front auxiliary frame involved in present embodiment, therefore, herein according to The structure of vehicle left side is illustrated, and the structure of vehicle right side is omitted.

Vehicle V involved in present embodiment is that fore head is set to shorter compact car.As shown in Figure 2 and Figure 3, vehicle V Front have structure of front auxiliary frame 1 (hereinafter referred to as " subframe 1 "), the subframe 1 setting along vehicle front-rear direction extend Pair of right and left front longitudinal beam 100 lower section, to constitute suspension part pair of right and left lower arm 50 be supported.

Front longitudinal beam 100 is made of the cylindrical body of the closed sectional shape extended along vehicle front-rear direction, on its front end, warp Upside collapse box for car 102 is installed by the flange 102a of 102 side flange 100a and upside collapse box for car.

Upside collapse box for car 102 is made of the cylindrical body of the closed sectional shape extended along vehicle front-rear direction, with front longitudinal beam 100 front connection.The front end of the upside collapse box for car 102 of left and right is linked by bumper reinforcement 103 extending along the width of the car.

In addition, as shown in Figure 1 to Figure 3, the front end of aftermentioned subframe 1 passes through front end support 107 and flange 100a It is linked to the bottom surface of front longitudinal beam 100, and middle part passes through the (ginseng of intermediate support 108 to the vehicle of subframe 1 in the front-back direction According to Fig. 2, Fig. 3) bottom surface of front longitudinal beam 100 is linked to by fastener (illustration omitted).

In addition, the accommodating space and car room of the dynamical systems such as engine will be accommodated by being provided in the rear of vehicle of front longitudinal beam 100 The front panel 104 of separation.The rear end of front longitudinal beam 100 is connected to the leading flank of front panel 104.Moreover, in the lower part of front panel 104 It is provided with the floor beams 105 extended from the rear end of front longitudinal beam 100 along vehicle front-rear direction.In the lower bond of the floor beams 105 It is fixed with the guesset 106 of wedge shaped shape under side view, floor beams 105 and guesset 106 form closed sectional.Above-mentioned subframe 1 rear end is linked to the floor beams 105 and guesset 106 of body side by fastening part 63.

As shown in Figure 1 to Figure 3, subframe 1 by subframe main body 2, from subframe main body 2 via linking part 31 and forwards The pair of right and left longitudinal member 3 of extension, the front beam 35 (referring to Fig.1) in the vehicle width direction linking the front of longitudinal member 3, Be formed as groined type shape along the intermediate transverse girder 36 (referring to Fig.1) that vehicle width direction is linked in the front of subframe 1.

Subframe main body 2 and longitudinal member 3 have upper plate 1A and lower plate 1B, by by the opposing part of lower plate 1B and upper plate 1A Tap closes and is formed as hollow shape, and upper plate 1A constitutes upper side and to extend to correspondingly lower section from the edge of the upper side Mode bending forms, and lower plate 1B constitutes downside and the bending in such a way that the edge from the downside extends to correspondingly top It forms.

As shown in Figure 1, subframe main body 2 includes suspension crossbeam 4 extending along the width of the car, from the subframe main body 2 The front of the left and right sides forwards protruding portion 5 in front of pair of right and left outstanding, from the rear portion of the subframe main body 2 to vehicle width direction Protruding portion 6 on the outside of the vehicle width outstanding of outside.

In present embodiment, front protruding portion 5 is substantially horizontally prominent to vehicle width direction outside with extending forwards, Protruding portion 6 is substantially horizontally and prominent to vehicle width direction outside substantially in parallel with vehicle width direction on the outside of vehicle width.

Longitudinal member 3 is mutually continuous by linking part 31 and the front end of front protruding portion 5.Specifically, linking part 31 with From the front end of protruding portion 5 to direction same as the front protruding portion 5 and projected direction that is, front extends and in substantially straight Linearly continuously extend toward vehicle width direction outside, and at the more position in front of support portion 17 and vertical on front side of than aftermentioned arm It is formed as one to component 3.Longitudinal member 3 from the front end of linking part 31 and vehicle front-rear direction substantially in parallel further along Fang Yanshen.It is formed in the rear portion of longitudinal member 3 relative to the curved flex portion 7 of linking part 31.

In present embodiment, as shown in Fig. 2, the front end of longitudinal member 3 is orthogonal with vehicle front-rear direction (longitudinal direction) Direction section and longitudinal member 3 rear end the direction orthogonal with vehicle front-rear direction section in the case where facing at least partly It is overlapped.

In addition, as shown in Figure 1 to Figure 3, the longitudinal wall on the outside of the middle part in the front-back direction and vehicle width direction of longitudinal member 3 The side surface part 3a of shape is equipped with the female rib 8 as warpage promotion division, so as to when the oblique collision before vehicle V occurs Promote the middle part of longitudinal member 3 to tortuous deformation on the inside of vehicle width direction.

Female rib 8 is formed as the surface of the side surface part 3a on the outside of the vehicle width direction relative to longitudinal member 3 and to vehicle width side The concavity that is recessed inwardly and be in the up-down direction lengthwise shape.

In addition, in the front end of longitudinal member 3, engagement is fixed with front end support outstanding upwards as shown in above-mentioned figure 107, front side flange part 107a is provided on the leading flank of the front end support 107.Moreover, at the flange part 107a of front side Portion's leading flank is equipped with downside collapse box for car 11 via the flange 11a of plate.

As shown in Fig. 2, downside collapse box for car 11 is by constituting the upper plate 11A of upper side and constituting the lower plate 11B of downside It is formed that quadrangle is cone-shaped, their rear end engages respectively is fixed on flange 11a.Downside collapse box for car 11 can be based on as a result, Compressive deformation occurs from the collision load that vehicle front inputs.In addition, symbol 12 of the Fig. 1 into Fig. 3 indicates in the direction of vehicle width On by the downside center beam of bumper of each front end connection of collapse box for car 11 on the downside of pair of right and left.

In addition, as shown in Figure 1 to Figure 3, the front side flange part 107a that front end support 107 has is with past from the upper end Lower part extends gradually to stretching on the outside of vehicle width direction, and its underpart extend out to big with the vehicle width direction outer end of downside center beam of bumper 12 It causes at identical vehicle width direction position (referring to Fig.1).Moreover, longitudinal member 3 front and by under the flange part 107a of front side The corner constituted in portion toward the extension of stretching on the outside of vehicle width direction and the side surface part 3a on the outside of the vehicle width direction of longitudinal member 3 On be provided in extended element 13 on the outside of the columnar vehicle width direction of triangle, on the outside of the vehicle width direction extended element 13 have with to Front extends and triangular shaped to the vertical view stretched out on the outside of vehicle width direction and have thickness in the up-down direction.Moreover, should The front end of extended element 13 is engaged in the flange part 107a of front side toward the extension of stretching on the outside of vehicle width direction on the outside of vehicle width direction The trailing flank divided, and the vehicle width direction inner end of extended element 13 is engaged in the vehicle width side of longitudinal member 3 on the outside of the vehicle width direction The front of side surface part 3a outward.

In addition, as in Fig. 1, Fig. 3 amplifier section and Fig. 4, Fig. 5 shown in, before the front of front protruding portion 5 is provided with arm Collateral support part 17, the axis support via front side linking part 55 (front side liner 55) (referring to Fig. 4, Fig. 5) of arm front side support portion 17 The front of lower arm 50, also, it is housed in the inside being made of on the protruding portion 5 of front lower plate 1B and upper plate 1A with substantially whole State setting in space S 5.

As shown in the amplifier section in Fig. 3, on front side of arm support portion 17 include supporting support 18 on front side of arm, to lower arm 50 before The bolt 19 and nut 20 of the progress axis support of side linking part 55.

As shown in Fig. 1, Fig. 3, Fig. 5, front protruding portion 5 leading flank and formed between upper plate 1A and lower plate 1B oriented Vehicle front and the front openings portion 15 being just open into vehicle width direction.Moreover, as shown in figs. 3 and 5, the protruding portion 5 in front The back face aperture portion 16 that trailing flank forms oriented rear of vehicle and is open to vehicle width direction foreign side.

Front openings portion 15 is primarily used for for the bolt 19 of the axis support of front side linking part 55 being anchored on branch on front side of arm The maintenance of bracket 18 is supportted with hole (operation hole).

Back face aperture portion 16 is from the rear face of the front of front protruding portion 5 to linking part 31 and each rear face of flex portion 7 Range continuously be open to be formed.Wherein, the opening portion of the rear face of the front of front protruding portion 5 is opened to vehicle width direction outside Mouthful, as shown in Figure 1, Figure 4, Figure 5, with allow lower arm 50 the extended arm 51 of aftermentioned vehicle width direction vehicle width direction inboard portion from The opening portion be inserted into front protruding portion 5 inner space S5 in mode and be set.

As shown in Figures 3 to 5, on front side of above-mentioned arm supporting support 18 by basal part 18a, from the front end of basal part 18a The front wall portion 18b of standing, it is formed integrally as under side view opening upwards from the rear wall parts 18c that the rear end of basal part 18a erects " Qian " shape of mouth (referring to the enlarged drawing in Fig. 3).The downside of lower plate 1B in the front of front protruding portion 5 is arranged in basal part 18a On face, which is fixed on by engagement by bolt and nut.

As shown in Figure 4, Figure 5, front wall portion 18b is with prominent across front in the range from linking part 31 to the rear portion of flex portion 7 The mode of the inner space S5 in portion 5 and to occlude each rear face in back face aperture portion 16 with linking part 31 and flex portion 7 out The mode of comparable opening portion and to stretching out on the outside of vehicle width direction, vehicle width direction outer end be engaged in the vehicle of flex portion 7 The rear end of side surface part 7c on the outside of wide direction.Front wall portion 18b is formed with the rear face 7a of linking part 31 and flex portion 7 as a result,.Before Wall portion 18b linearly extends from linking part 31 to the range of flex portion 7 with vehicle width direction substantially in parallel, is based on the antetheca Portion 18b and the rear face 7a of flex portion 7 formed are extended roughly in parallel with vehicle width direction.

Rear wall parts 18c is in a manner of the inner space S5 across the front protruding portion 5 extended along vehicle front-rear direction to vehicle Extend on the inside of wide direction, vehicle width direction inner end from the front face engaging behind in front protruding portion 5.

As shown in figure 4, the facing part on vehicle front-rear direction front wall portion 18b and rear wall parts 18c that is, they It is respectively formed in the vehicle width direction approximately mid way between for the part being overlapped in vehicle width direction and allows the front-rear direction of 19 break-through of bolt Consistent jack 18d, 18e.

In addition, protruding portion 6 is by upper plate 1A under on the outside of the vehicle width at 2 rear portion of subframe main body as shown in Fig. 2, Fig. 3, Fig. 6 Plate 1B and be formed as the hollow shape outstanding on the outside of vehicle width direction, in the suitable with surface side on the outside of front side and vehicle width direction of its Position in be formed with the junction section comprising them and continuously to vehicle front and the opening portion of vehicle width direction outer openings 69。

As shown in Fig. 1 to Fig. 3, Fig. 4, Fig. 6, be equipped in protruding portion 6 on the outside of the vehicle width: rigidity lower than other positions it is low just Property portion 61 (warpage promotion division)；The retrogressing load for retreating load or lower arm 50 of subframe 1 is utilized in collision before vehicle occurs To make the subframe main body 2 from the disengaging portion 62 that above-mentioned front longitudinal beam 100 is detached from.

As shown in Figure 1, the low rigid portion 61 is formed in the imagination for linking the flex portion 7 of longitudinal member 3 and disengaging portion 62 Line L1 and be directing forwardly 5 rear of protruding portion extending direction imaginary line L2 between region X in.In present embodiment, region X It is formed on the outside of vehicle width in protruding portion 6 relative to disengaging portion 62 and is located at the position on the inside of vehicle width direction and is to be located at disengaging portion 62 Base end part and vehicle width on the outside of protruding portion 6 base end part between position.

As shown in Fig. 1, Fig. 6, it is equipped in disengaging portion 62 and the tight of vehicle body is fixed in the rear end of lower arm 50 and subframe 1 together Gu portion 63 and being mounted on the rear of vehicle of the fastening part 63 and being embedded in the reference pins 64 of vehicle body.

As shown in fig. 6, fastening part 63 has bolt 65 and weldering as the fastener for the guesset 106 for being anchored on body side Nut 66 is filled, and fastening part 63 has to allow 65 break-through of bolt and is threaded through in upper plate 1A and lower plate 1B and forms the fastening part Jack 63a, 63b on 63 position, the jack 63a, 63b are arranged in a manner of being overlapped in above-below direction.Fastening part 63 is had Set rear side linking part 56 (back side liners 56) on the rear end of standby 65 axis of bolt support lower arm 50.That is, the fastening part 63 is simultaneous Make the arm Backside support portion that 50 rear portion of lower arm is supported via rear side linking part 56.

In addition, reference pins 64 are installed in the rear of vehicle of the jack 63b in fastening part 63, distal portion in substantially round Cone cell and protrude upwards, and be directed toward 106 side of guesset.

In addition, as shown in Figures 4 to 6, on the rear end of longitudinal member 3 in set flex portion 7, and in upper plate 7A (ginseng According to Fig. 6) and lower plate 7B (referring to Fig. 5) between constitute have inner space S7, inner space S7 be equipped with steel plate strengthens angle Support member (reinforcement part) 21.Reinforce guesset 21 by horizontal-extending baseplate part 21a, from the vehicle width direction inner edge of baseplate part 21a The vehicle width direction medial flange portion 21b that hangs down, on the outside of the vehicle width direction of baseplate part 21a and the edge of front side is downward The vehicle width direction outboard flanges portion 21c just to hang down, the rear flange portion 21d mono- hung down from the rear of baseplate part 21a Body is formed.

As shown in figure 4, vehicle width direction medial flange portion 21b is engaged in be equivalent to the inside angle part of flex portion 7, inside side The interface 7b of face and front face.As shown in Figure 4, Figure 5, vehicle width direction outboard flanges portion 21c is engaged in the outside of flex portion 7 Side surface part 7c.Rear flange portion 21d is engaged in the rear face 7a of flex portion 7 that is, constitutes support branch on front side of the arm of rear face 7a Extension on the outside of the vehicle width direction of the front wall portion 18b of frame 18.

Reinforce the curved corner that guesset 21 is arranged at flex portion 7 as a result,.It is made only in that is, reinforcing guesset 21 Flex portion 7, and be not formed at relative to flex portion 7 and be located on the linking part 31 on the inside of vehicle width direction, also it is not formed at front In protruding portion 5 for example into the range of the periphery in front openings portion 15, as shown in figure 4, its relative to support portion 17 on front side of arm and Offsettingly it is arranged on the outside of overall width direction.

In addition, above-mentioned vehicle width direction medial flange portion 21b and vehicle width direction outboard flanges portion 21c is engaged in flex portion The middle position of the up and down direction of the dogleg section of the bending downwards of upper plate 1A in 7.As a result, as shown in fig. 6, reinforcing angle brace The baseplate part 21a of part 21 is just approximate horizontal to be arranged in height identical with lower arm 50, and the rear flange of guesset 21 is reinforced Portion 21d is just arranged in the aftermentioned front face 53 extending along the width of the car with lower arm 50 to be prolonged positioned at aftermentioned front-rear direction If the position (that is, identical height and position) that the front face 53a (referring to Fig. 4) of 52 face side of arm is overlapped in the up-down direction On.

In addition, as Figure 1 and Figure 4, lower arm 50 is by the vehicle width direction that extends roughly in parallel in its front and vehicle width direction Extended arm 51, from the front and back that the vehicle width direction approximately mid way between of the extended arm 51 of the vehicle width direction extends to rear of vehicle It is formed integrally as overlooking substantially T-shaped to extended arm 52.

As shown in Figure 1, Figure 2, Figure 4 shows, the outer end of the vehicle width direction of extended arm 51 is provided with and connects via ball in the direction of vehicle width Head 54a and be linked to support wheel knuckle arm (not shown) knuckle support portion 54.

As shown in Figure 4, Figure 5, the inner end of the vehicle width direction of extended arm 51 is equipped with front side linking part 55 in the direction of vehicle width (front side liner 55).The front side linking part 55 is set in such a way that outer cylinder 55a and inner cylinder 55b separate appointed interval in cannula-like It sets, the cricoid rubber component 55c (liner body) being made of elastomer is installed between its outer cylinder 55a and inner cylinder 55b, The inner end of the vehicle width direction of the lateral surface and extended arm 51 of vehicle width direction of outer cylinder 55a integrally fixed engagement (referring to Fig. 5).

Moreover, in present embodiment, on front side of the arm that subframe main body 2 has support portion 17 have before and after vehicle 19 break-through of bolt that direction extends passes through spiral shell in jack 18d, 18e and the hollow part of the inner cylinder 55b of front side linking part 55 Mother 20 and fastened.As a result, as shown in Figure 4, Figure 5, front side linking part 55 is in the vehicle width direction of the extended arm 51 of vehicle width direction It side can from the mode in the inner space S5 for being inserted into front protruding portion 5 to the back face aperture portion 16 of vehicle width direction outer openings Swingingly supported by 17 axis of support portion on front side of arm.

As shown in Figure 4, Figure 5, in lower arm 50, as shown in Figure 1, Figure 2, Figure 4 shows, the front side supported by 17 axis of support portion on front side of arm Linking part 55 and the mutual front-rear position of knuckle support portion 54 are overlapped, and the extended arm 51 of vehicle width direction is linearly by front side Mode that linking part 55 and knuckle support portion 54 link and be extended along the width of the car (referring to Fig. 4).

In addition, as shown in fig. 6, the front end of lower arm 50 is formed in the flange shape front face 53 hung down.Before this Portion 53 is the part of the front face 53a in the extended arm 51 of vehicle width direction for be formed lower arm 50.As shown in Figure 3, Figure 4, before being located at The face side of the extended arm 52 of rear direction front face 53a (that is, in the vehicle width direction of front face 53 be located at front-rear direction it is extended The position 53a of the face side of arm 52) it is formed in a manner of being extended roughly in parallel with vehicle width direction.

As a result, the rear flange portion 21d of above-mentioned reinforcement guesset 21 in vehicle front via supporting support on front side of arm 18 front wall portion 18b and the opposite mode of front face 53a with the face side for being located at the extended arm 52 of front-rear direction in lower arm 50 It is engaged in front wall portion 18b (referring to Fig. 4, Fig. 6).

As shown in Figure 4, Figure 5, due to the rear face 7a of the flex portion 7 front wall portion 18b of supporting support 18 (arm on front side of) and under In arm 50 positioned at extended 52 face side of arm of front-rear direction front face 53a respectively with the substantially parallel extension of vehicle width direction, therefore, Rear face 7a and front face 53a with each other in the longitudinal direction via front wall portion 18b and opposite mode is formed parallel to.

In addition, as shown in Figure 1, Figure 2, shown in Fig. 4, Fig. 6, the extended arm 52 of front-rear direction in lower arm 50 is with its rear end from vehicle width The front openings part of opening portion 69 in outside protruding portion 6 is inserted into the mode between upper plate 1A and lower plate 1B and is arranged at Fastening part 63.

Moreover, as shown in Fig. 2, Fig. 4, Fig. 6, the extended arm 52 of front-rear direction is from the vehicle width side of the extended arm 51 of vehicle width direction It is rearward extended substantially horizontally to middle position, above-mentioned rear side linking part 56 is installed in its back-end.As shown in figs. 4 and 6, Rear side linking part 56 by be fixed between the upper side of upper plate 1A and the downside of lower plate 1B inner cylinder 56a, be fixed on lower arm 50 The outer cylinder 56b of rear end and the cricoid rubber component 56c structure being arranged in the mode being sandwiched between inner cylinder 56a and outer cylinder 56b At, and in such a way that the hollow part of inner cylinder 56a and jack 63a, 63b are be overlapped in the up-down direction and be set.

In addition, in body side, as shown in fig. 6, accordingly existing with the hollow part of inner cylinder 56a and the position of jack 63a, 63b The downside of guesset 106 is equipped with the jack 106a relative to vehicle front-rear direction obliquely inclined long hole shape, and Jack 105a is also equipped in floor beams 105.Jack 105a is constituted being welded for the tubulose of fastening part 63 with bolt 65 together 66 break-through of nut, the jack 105a of downside and floor beams 105 of the nut 66 that is welded based on guesset 106, is set with seat surface It sets the mode around jack 106a and is fixed.

In present embodiment, 65 break-through of bolt is in the inner cylinder 56a's of jack 106a, 63a, 63b and rear side linking part 56 Hollow part, and the nut 66 that is welded fastens, as a result, the rear end of lower arm 50 and protruding portion 6 on the outside of the vehicle width of subframe 1 together by Jointly it is fastened and fixed to the guesset 106 of body side.

In addition, the hollow part of inner cylinder 56a and the respective aperture of jack 63a, 63b can be set to that it is straight greater than bolt 65 Diameter above-mentioned in the state of being jointly fastened and fixed, is formed with figure in fastening part 63 and between inner cylinder 56a and bolt 65 Clearance G shown in 6.

In addition, as shown in fig. 6, being worn in floor beams 105 and guesset 106 and on position corresponding with reference pins 64 There is open pore 105b and datum hole 106b.

In above-mentioned open pore 105b and datum hole 106b, the aperture of datum hole 106b is set to straight with reference pins 64 Diameter is roughly the same, and above-mentioned in the state of being jointly fastened and fixed, datum hole 106b is almost seamlessly embedding with reference pins 64 It closes.Therefore, in present embodiment, above-mentioned clearance G is set to be greater than the gap between datum hole 106b and reference pins 64.

In addition, the symbol 37 in Fig. 1 to Fig. 4, Fig. 6 be in order to ensure vehicle when driving in the front-back direction rigidity and The supporting element for absorbing impact when vehicle front collision by tortuous deformation occurs.

Herein, reference pins as subframe 1 relative to the positioning of vehicle body of reference pins 64 and datum hole 106b, datum hole And it is utilized.Specifically, when carrying out subframe 1 being installed on the installation exercise of vehicle body, by being embedded in reference pins 64 The datum hole 106b of the guesset 106 of body side is able to carry out the positioning relative to vehicle body of fastening part 63, and then can be appropriate The positioning relative to vehicle body of ground progress subframe 1.

Secondly, illustrating the deformation condition of the subframe 1 when vehicle V involved in present embodiment is collided before generation.

Firstly, the upside collapse box for car 102 in front longitudinal beam 100 (referring to Fig. 2) front end is arranged in collision before vehicle V occurs (referring to Fig. 2) and front longitudinal beam 100 itself are based on collision load and are compressed axially, to absorb impact energy.

On the other hand, in subframe 1, downside collapse box for car 11 is based on collision load and compressive deformation occurs, and not by under The collision load that the compressive deformation of side collapse box for car 11 is absorbed into just is input to subframe 1, and had based on subframe 1 Longitudinal member 3 is compressed axially to carry out complementary impact energy and absorb.

When longitudinal member 3 is compressed axially, above-mentioned collision load is passed through along from the flex portion 7 of the rear end of longitudinal member 3 From linking part 31, front protruding portion 5 and toward the first load-transferring path (the block arrow D1 in referring to Fig.1) of suspension crossbeam 4 and By the absorption of carry out impact energy, dispersion.

At this point, being based on above-mentioned collision load in low rigid portion 61, generates the big load from vehicle front and make With and promote recessed to sell off shape.Recessed with the low rigid portion 61 sells off shape, and turn forward such change in disengaging portion 62 Shape.

Herein, flex portion 7 becomes due to being reinforced the reinforcement of guesset 21 thus being difficult to happen warpage relative to collision load Shape, but when there is the input of biggish collision load, the flex portion 7 positioned at 3 rear end of longitudinal member can be reversed such folding Song deformation.

Even so make flex portion 7 that warpage occur with collision load, but due to the rear face 7a (reference of flex portion 7 Fig. 4, Fig. 5) it is abutted with the front face 53a of lower arm 50, therefore, a part such as Fig. 1 of the collision load come from the transmitting of longitudinal member 3 Disengaging portion 62 is passed to from flex portion 7 via lower arm 50 as shown in block arrow D2.

Herein, the retrogressing deformation of flex portion 7 caused by the preceding collision with vehicle, the rear face 7a of flex portion 7 is (before arm The front wall portion 18b of side supporting support 18) and 50 front face 53a of lower arm by mutual face mutually to top in a manner of abut against, also, Reinforce guesset 21 rearward to press on before lower arm 50 in identical height from front via the rear face 7a of flex portion 7 Therefore load can be transmitted to lower arm 50 well from flex portion 7 by portion 53a.

In lower arm 50, since the extended arm 52 of the front-rear direction rearward extended is arranged on and retreats the flex portion deformed Next side (referring to Fig. 4, Fig. 5) of the extended arm 51 of vehicle width direction locating for the front face 53a that 7 rear face 7a is abutted, therefore, The collision load from the flex portion 7 for retreating deformation can be born well and is transmitted to rear.

Moreover, based in the second load-transferring path (ginseng from such flex portion 7 via the past disengaging portion 62 of lower arm 50 According to the block arrow D2 in Fig. 1) on the collision load that transmits, in disengaging portion 62, bolt 65 that fastening part 63 has, reference pins 64 are pushed to rear of vehicle.In present embodiment, between being formed between bolt 65 and the inner cylinder 56a of rear side linking part 56 Gap G (referring to Fig. 6), therefore, as inner cylinder 56a is mobile toward rear of vehicle, fastening part 63 is mobile to rear of vehicle.

As a result, around jack 63b, the datum hole 106b of guesset 106 is expanded based on reference pins 64, the jack Rigidity of support around 63b is just remarkably decreased.

In addition, being based on the second load-transferring path, disengaging portion 62 leans forward such deformation, when vehicle V collision into When one step develops, with the recessed enhancement for selling off shape of low rigid portion 61, further promote leaning forward for disengaging portion 62.As a result, de- It is fulcrum with reference pins 64, the bolt 65 that fastening part 63 has and the nut 66 that is welded are based on so-called lever from portion 62 Principle and be pulled out from the guesset of body side 106 to the back lower place, as a result, the rear end of subframe 1 from vehicle body (floor beams 105 and Guesset 106) it is detached from.

That is, being set to flex portion by the way that 21 manner described above of guesset will be reinforced as described above in present embodiment 7, it can reinforce rolling over for the load of the transmission path along the first load-transferring path and the second load-transferring path this two side Pars convoluta 7 can preferentially be reinforced especially by guesset 21 is reinforced for the transfer charge along the second load-transferring path Flex portion 7 can be improved the load transitivity from flex portion 7 via lower arm 50 toward disengaging portion 62.

The subframe 1 of vehicle V involved in above-mentioned present embodiment has: subframe main body 2, is arranged in pair of right and left The lower section of the front longitudinal beam 100 (left side is illustrated only in Fig. 2, Fig. 3) extended along the longitudinal direction in front part of vehicle and to suspension into Row support；Pair of right and left longitudinal member 3 extends forwards from subframe main body 2；Wherein, arm is equipped in the subframe main body 2 Front side support portion 17 and fastening part 63 as arm Backside support portion, on front side of arm before the lower arm 50 of 17 pairs of composition suspensions of support portion Side linking part 55 is supported, and arm Backside support portion is supported the rear side linking part 56 of lower arm 50, and in fastening part 63 In be equipped with using subframe 1 retrogressings load or lower arm 50 retrogressing load come make the subframe main body 2 from front longitudinal beam 100 disengaging The disengaging portion 62 (referring to figs. 1 to Fig. 4, Fig. 6) as release unit, longitudinal member 3 rear portion and on front side of relative to arm Support portion 17 and be located at vehicle width direction on the outside of position be equipped with flex portion 7, have at the rear portion of lower arm 50 and extend along the longitudinal direction The extended arm 52 of front-rear direction, the vehicle of the extended arm 52 of front-rear direction is located in the rear face 7a and lower arm 50 of the flex portion 7 The front face 53a of front side extends roughly in parallel (referring to Fig. 4, Fig. 5) in the vehicle width direction, in portion 7a below with front face It is provided on 53a opposite position and reinforces guesset 21 (referring to fig. 4 to fig. 6).

According to above structure, raising rigidity can either be taken into account using the subframe 1 in the shape around dynamical system Collision load transitivity (takes into account enhancing flex portion 7 and enhances the load biography toward lower arm 50 before (eigentone) and raising It passs).

According to above structure, it is negative so as to bear preceding collision well to enhance flex portion 7 by reinforcing guesset 21 Lotus, and even if so that flex portion 7 is deformed because of preceding collision load and retreat, front face 53a and warpage based on lower arm 50 The mutual face rear face 7a in portion 7 is connected to each other, the reinforcement guesset 21 that flex portion 7 has in the vehicle width direction in parallel The front face 53a of the lower arm 50 of extension to top so as to via the extended arm 52 of front-rear direction in lower arm 50 toward fastening part 63 (arm Backside support portion) transfer charge (referring to Fig. 6).

Moreover, reinforce guesset 21 by being arranged on position opposite with front face 53a in portion 7a below, it is secondary as a result, Vehicle frame 1 can either be difficult to happen the resonance with vibration when driving in the shape around dynamical system, can be improved rigidity (Gu There is vibration frequency).

In subframe 1 involved in present embodiment, reinforce guesset 21 be positioned generally horizontal in before lower arm 50 The position that facial 53a is overlapped in the up-down direction (referring to Fig. 6).

According to above structure, the weight efficiency (weight that the transferring structure of collision load is transmitted to lower arm 50 can be improved efficiency)。

In addition, above-mentioned " approximate horizontal " be indicate reinforce guesset 21 with the front face 53a of lower arm 50 in upper and lower The position being overlapped upwards with respect to the horizontal plane forms the situation of the angle of 0 °~10 ° of range, it is therefore especially desired to which the angle is 0 ° (level).

Specifically, according to above structure, though the preceding collision based on vehicle and cause the deformation of flex portion 7 to retreat, also can Enough reinforcements guessets 21 having from flex portion 7 in identical height and the lower arm 50 that is located behind directly or indirectly Ground and the mode just abutted mutually over the ground and efficiency transfer charge well.

It is positioned generally horizontal in the front face 53a of lower arm 50 in the up-down direction moreover, because reinforcing guesset 21 On the position of coincidence, that is, being arranged on as described above being capable of the efficiency position toward 50 transfer charge of lower arm and appearance well Gesture, it is therefore not necessary to such as the periphery using not only reinforcement flex portion 7 but also reinforcement comprising support portion 17 on front side of the arm of linking part 31 The reinforcement guesset 21 itself is formed as large-scale component like that by whole structure just can be improved weight efficiency.

In subframe 1 involved in present embodiment, reinforces guesset 21 and offsettingly set relative to support portion 17 on front side of arm It sets on the outside of overall width direction (referring to Fig. 4, Fig. 5).

According to above structure, will reinforce guesset 21 due to using and offsettingly be arranged in relative to arm front side support portion 17 Structure on the outside of vehicle width direction therefore can be so that it avoids the front side linking part 55 or preceding that support portion 17 has on front side of arm The mode of face opening portion 15 is arranged on the outside of vehicle width direction.

Therefore, even if support portion 17 on front side of arm to be arranged in 54 weight of knuckle support portion of such as front-rear position and lower arm 50 The position compared with the past and compared with front such as the position of conjunction, the swing of lower arm 50 will not be reinforced guesset 21 and be hindered, energy Enough improve the swing freedom degree of lower arm 50.In addition, can be provided as in the present embodiment according to above structure from front The front openings portion 15 in the biggish maintenance hole until the front of protruding portion 5 to linking part 31.

In addition, in subframe 1 involved in present embodiment, the knuckle support portion of support portion 17 and lower arm 50 on front side of arm 54 front-rear position is overlapped, and lower arm 50 is extended along the width of the car in a manner of linearly linking them (referring to Fig.1, schemes 4, Fig. 5).

According to above structure, the anteroposterior position of the knuckle support portion 54 of the front-rear position and lower arm 50 of arm front side support portion 17 It sets coincide with one another (consistent), the extended arm of the vehicle width direction of arm 50 51 is in a manner of linearly linking them and along vehicle width Direction extends, therefore, and for example formed as to the previous lower arm phase of the curved generally arcuate shape in side later on the inside of vehicle width direction Than the rigidity of support of the vehicle width direction of wheel can be further increased.

Further, since in the front of the lower arm 50 front face 53a parallel with vehicle width direction easy to form, therefore, in vehicle Before occurring when collision, it can be improved when the rear face 7a of flex portion 7 is connected to the front face 53a of lower arm 50 from flex portion 7 down The load transitivity of arm 50.

Therefore, according to above structure, the transitivity of wheel supporting rigidity and collision load can be taken into account.

Specifically, in order to improve the rigidity of support of the vehicle width direction of wheel, it may be desirable to use following structure: Extend the part in lower arm 50 between front side linking part 55 and knuckle support portion 54 with the substantially parallel extension of vehicle width direction, Even if the extended arm 51 of vehicle width direction also in lower arm 50 is linearly arranged along vehicle width direction.

In addition, from the viewpoint of the rigidity of support of the vehicle width direction of wheel, suspension crossbeam that subframe main body 2 has 4 more preferably by by support portion 17 on front side of pair of right and left arm along vehicle width direction connection in a manner of be arranged.

However, subframe 1 is had to using following structure: suspension crossbeam 4 being made to be moved to rear in order to avoid dynamical system Arm is arranged on the front protruding portion 5 for being projected into front at left and right sides of it relative to suspension crossbeam 4 in the case where being laid out Front side support portion 17, that is, use structure unfavorable from the viewpoint of the rigidity of support of the vehicle width direction of wheel.

Therefore, using the subframe of above-mentioned patent document 1 (No. 5949600 bulletins of Japanese Patent No.) as the known of representative Subframe in, by front side of the arm that the position relative to the support portion of knuckle is located behind at support portion support lower arm Front, come ensure wheel vehicle width direction rigidity of support or the longitudinal member of front protruding portion that has of subframe main body Rigidity of support.

However, being so located behind the position of support portion on front side of arm relative to the position of knuckle support portion using Structure in the case where, not only there is rooms for improvement in the viewpoint of wheel supporting rigidity, but also due to the front side of lower arm Towards slightly therefore back sweep collides before vehicle occurs and retreats deformation while being compressed axially on the inside of vehicle width direction Slave longitudinal member when the rear end of longitudinal member is abutted with the leading flank of lower arm toward lower arm collision load transmission efficiency viewpoint On, there is also rooms for improvement.

In order to improve slave longitudinal member when collision before wheel supporting rigidity or vehicle occur toward lower arm collision load Transmission efficiency, and so that the position of support portion on front side of the arm in subframe main body is located at front, or make prominent from front Via linking part, just the warpage angle relative to linking part of longitudinal member outstanding is set to smaller (more connect further along in portion Nearly right angle), then it can reduce the rigidity of the front protruding portion itself of subframe main body.

In this regard, in the present embodiment, on the one hand, the front-rear position of support portion 17 and the knuckle branch of lower arm 50 on front side of arm The front-rear position of support part 54 coincides with one another, and lower arm 50 is prolonged in a manner of linearly linking them along vehicle width direction It stretches, on the other hand, guesset 21 is reinforced in setting in flex portion 7, to improve from flex portion 7 toward the effect of the collision load of lower arm 50 Rate, therefore, the vehicle width direction linearization(-sation) based on lower arm 50 and can be improved wheel supporting rigidity, and wheel supporting can be taken into account The transitivity of rigidity and collision load.

In addition, being equipped in the middle part of longitudinal member 3 as the past vehicle of promotion in subframe 1 involved in present embodiment The female rib 8 of the warpage promotion division of warpage on the inside of wide direction (referring to figs. 1 to Fig. 3).

According to above structure, can either promote when small overlapping collision (small overlap collision) occurs The infolding of longitudinal member 3, and collision load transitivity when the excellent preceding collision other than small overlapping collision can be obtained.

Specifically, firstly, when small overlapping collision occurs, vehicle width direction that the front end of longitudinal member 3 has outside The vehicle width direction exterior portion of extended element 13 (referring to Fig.1) bears collision load, overlooks on the outside of the lower vehicle width direction and extends structure Part 13 is rotated centered on front end support 107, and longitudinal member 3 is pressed on the outside of vehicle width direction toward inside.

Moreover, according to above structure, since the middle part in longitudinal member 3 is provided with female rib 8, it is being based on vehicle Toward when the pressing of inside on the outside of the vehicle width direction of the slave longitudinal member 3 of extended element 13 on the outside of wide direction, female rib 8 becomes longitudinal The starting point of the bending deformation of component 3, thus the middle part of longitudinal member 3 effectively warpage can be made when small overlapping collision occurs Deformation, so as to absorb collision load.

On the one hand, in the present embodiment, as described above, being located at front and back in the rear face 7a and lower arm 50 of flex portion 7 Extended roughly in parallel in the vehicle width direction to the front face 53a of the face side of extended arm 52, and in portion 7a below with It is provided on front face 53a opposite position and reinforces guesset 21, therefore, in collision before vehicle occurs, behind flex portion 7 Portion 7a can be abutted with the front face 53a of lower arm 50 well based on guesset 21 is reinforced, so as to improve from flex portion 7 Toward the load transitivity of lower arm 50.That is, due to using the load transmitting being different from using the first load-transferring path as main body Structure, structure from the energetically transfer charge of the second load-transferring path via lower arm 50, it is therefore not necessary to exceedingly improve The feelings that the flexural rigidity of flex portion 7 itself just can prevent the rigid phase of the middle part of longitudinal member 3 too low for flex portion 7 Condition.

In addition, above-mentioned " substantially parallel " is to indicate that the rear face 7a of flex portion 7 and the front face 53a of lower arm 50 are constituted Situation of angle in the range of 0 °~15 °, it is therefore especially desired to the angle ranging from 0 ° (parallel to each other).

Thereby, it is possible to reduce the poor rigidity between the middle part on longitudinal member 3 and the flex portion 7 of rear end, therefore, sending out It is raw it is common before collision rather than small overlapping when colliding, the collision can be made and transmit the centre that the load come passes through longitudinal member 3 The flex portion 7 of portion and rear end is dispersed, even if longitudinal member 3 is using the knot in the setting female rib 8 of middle part in the front-back direction Structure can also prevent unexpected bending deformation.

[variation]

The present invention is not limited in structure used by above-mentioned embodiment, can use various deformations Example.

For example, in the subframe 1 of above embodiment, using the structure of setting low rigid portion 61, still, in the present invention Low rigid portion 61 it is not necessary to structure, as long as the present invention using at least provided with using subframe 1 retrogressing load or lower arm 50 retrogressing load is come the structure for the release unit for being detached from the subframe main body 2 from front longitudinal beam 100.

That is, the present invention can also use following structure: unfavorable to be bypassed from longitudinal member 3 when being collided before generation The load that the mode of lower arm 50 is transmitted along the first load-transferring path from front protruding portion 5 to low rigid portion 61, and it is only sharp Make subframe main body via the load that the second load-transferring path of lower arm 50 to disengaging portion 62 transmits with along from flex portion 7 2 structures being detached from from front longitudinal beam 100.

In above embodiment, as making subframe main body use and send out from the release unit that front longitudinal beam 100 is detached from Make bolt 65 and the spiral shell that is welded using the reference pins 64 that are detached from portion 62 as fulcrum using the principle of so-called lever when colliding before death The structure that cap 66 is pulled out to the back lower place, still, the present invention is not limited thereto.For example, though the illustration is omitted it is also possible to adopt With following guide device: when being collided before generation, to bear the biography of load with fastener (bolt 65 and the nut 66 that is welded) It passs and is displaced apply the fastener itself to subframe 1 itself and push the mode of the active force of the subframe 1 and draw It leads.

In above embodiment, as reinforcement part an example and use reinforce guesset 21, still, the present invention is simultaneously It is not limited.For example, the present invention can also add by the high strength component using locality or to the filling of closed sectional inside Strong material etc. constitutes reinforcement part.

[summary of the invention]

Structure of front auxiliary frame involved in a technical solution of the invention includes: subframe main body, is supported in front part of vehicle Each lower section for the front longitudinal beam that pair of right and left extends along the longitudinal direction respectively is arranged in suspension, the suspension；And pair of right and left is vertical To component, respectively forwardly just extend from the subframe main body.

The subframe main body include support constitute on front side of the front of lower arm and the arm at rear portion of the suspension support portion and Arm Backside support portion；Make the subframe using subframe retrogressing load or lower arm retrogressing load in arm Backside support portion The disengaging portion that main body is detached from from the front longitudinal beam.

Each longitudinal member the longitudinal member rear portion and relative to support portion on front side of the arm and be located at vehicle width Direction outside has flex portion.

The lower arm has the front-rear direction extended portion extended along the longitudinal direction at the rear portion of the lower arm.

In the rear face of the flex portion and the lower arm before the vehicle front side of the front-rear direction extended portion Portion extends roughly in parallel in the vehicle width direction.

The face opposite with the front face of the front-rear direction extended portion in the rear face of the flex portion Portion is equipped with reinforcement part.

According to the above technical scheme, raising can either be taken into account using the subframe in the shape around dynamical system Collision load transitivity (reinforces flex portion and reinforces the load biography toward lower arm before rigidity (improving eigentone) and raising It passs).

In addition, " substantially parallel " is the front face institute structure for indicating the rear face and lower arm of flex portion in above-mentioned technical proposal At situation of angle in the range of 0 °~15 °, it is therefore especially desired to the angle ranging from 0 ° (parallel to each other).This related point, It is all the same in the present invention.

It as structure of front auxiliary frame involved in another technical solution of the invention, can be used such as flowering structure: the reinforcement Portion is positioned generally horizontal on the position being overlapped in the up-down direction with the front face of the lower arm.

According to the above technical scheme, it can be improved the weight efficiency of the transferring structure toward lower arm transmitting collision load.

In addition, in above-mentioned technical proposal, " approximate horizontal " be indicate reinforcement part with the front face of lower arm in above-below direction The position of upper coincidence with respect to the horizontal plane forms the situation of the angle of 0 °~10 ° of range, it is therefore especially desired to the angle ranging from 0 ° (level).This related point, it is all the same in the present invention.

In addition, can be used such as flowering structure: described as structure of front auxiliary frame involved in another technical solution of the invention Reinforcement part is offsettingly arranged on the outside of overall width direction relative to support portion on front side of the arm.

According to the above technical scheme, weight efficiency and arm swing freedom degree be can be improved.

In addition, can be used such as flowering structure: described as structure of front auxiliary frame involved in another technical solution of the invention The front-rear position of the knuckle support portion of the front-rear position and lower arm of support portion coincides with one another on front side of arm, and the lower arm is to be in Linearly the mode that support portion on front side of the arm links with the knuckle support portion is extended along the width of the car.

According to the above technical scheme, the transitivity of wheel supporting rigidity and collision load can be taken into account.

In addition, can be used as structure of front auxiliary frame involved in another technical solution of the invention such as flowering structure: in institute The middle part for stating longitudinal member is equipped with the warpage promotion division promoted toward warpage on the inside of vehicle width direction.

According to the above technical scheme, the infolding of the longitudinal member when small overlapping collision occurs can either be promoted, and can Obtain collision load transitivity when the excellent preceding collision other than small overlapping collision.

As described above, using each technical solution of the invention, it can either be using in the shape around dynamical system The subframe of shape, and raising rigidity (improving eigentone) can be taken into account and improve preceding collision load transitivity.

Claims

1. a kind of structure of front auxiliary frame, characterized by comprising:

Subframe main body, in front part of vehicle supporting suspension, the suspension is arranged in what pair of right and left extended along the longitudinal direction respectively Each lower section of front longitudinal beam；And

Pair of right and left longitudinal member respectively forwardly just extends from the subframe main body；Wherein,

After the subframe main body includes the front of lower arm and the arm front side support portion and arm at rear portion that support constitutes the suspension Collateral support part；Make the subframe main body using subframe retrogressing load or lower arm retrogressing load in arm Backside support portion From the front longitudinal beam be detached from disengaging portion,

Each longitudinal member the longitudinal member rear portion and relative to support portion on front side of the arm and be located at vehicle width direction Outside has flex portion,

The lower arm has the front-rear direction extended portion extended along the longitudinal direction at the rear portion of the lower arm,

The front face of vehicle front side in the rear face of the flex portion and the lower arm positioned at the front-rear direction extended portion exists It is extended roughly in parallel in vehicle width direction,

On the face opposite with the front face of the front-rear direction extended portion in the rear face of the flex portion Equipped with reinforcement part.

2. structure of front auxiliary frame according to claim 1, it is characterised in that:

The reinforcement part is positioned generally horizontal on the position being overlapped in the up-down direction with the front face of the lower arm.

3. structure of front auxiliary frame according to claim 1 or 2, it is characterised in that:

The reinforcement part is offsettingly arranged on the outside of overall width direction relative to support portion on front side of the arm.

4. structure of front auxiliary frame according to any one of claim 1 to 3, it is characterised in that:

The front-rear position of the knuckle support portion of the front-rear position and lower arm of support portion coincides with one another on front side of the arm, described Lower arm is extended along the width of the car in a manner of linearly linking support portion on front side of the arm and the knuckle support portion.

5. structure of front auxiliary frame according to any one of claim 1 to 4, it is characterised in that:

The warpage promotion division promoted toward warpage on the inside of vehicle width direction is equipped in the middle part of the longitudinal member.